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Effect of microalloying on the toughness of metallic glasses

Garrett, Glenn R. and Demetriou, Marios D. and Chen, Jason and Johnson, William L. (2012) Effect of microalloying on the toughness of metallic glasses. Applied Physics Letters, 101 (24). Art. No. 241913. ISSN 0003-6951. doi:10.1063/1.4769997.

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The effect of microalloying on the toughness of Cu-Ti-based metallic glasses is explored. Minor additions of Si and Sn in glass former Cu_(47)Ti_(34)Zr_(11)Ni_8 known to improve glass-forming ability are found here to sharply decrease toughness. The drop in toughness is associated with a small but meaningful increase in shear modulus, glass-transition temperature, yield strength, and a decrease in Poisson's ratio, implying a negative correlation between toughness and shear flow barrier. The strong influence of minor additions on the glass properties could be a useful tool for simultaneously tuning both the glass-forming ability and toughness of metallic glasses.

Item Type:Article
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Additional Information:© 2012 American Institute of Physics. Received 13 August 2012; accepted 20 November 2012; published online 12 December 2012. Authors would like to acknowledge the Caltech MURF program for undergraduate support.
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Subject Keywords:association, copper alloys, glass transition, metallic glasses, nickel alloys, Poisson ratio, shear flow, shear modulus, silicon alloys, tin alloys, titanium alloys, yield strength, zirconium alloys
Issue or Number:24
Classification Code:PACS: 81.20.-n; 81.40.Jj; 81.40.Lm; 82.30.Nr; 82.30.Nr; 64.70.P-
Record Number:CaltechAUTHORS:20130117-094726314
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36444
Deposited By: Tony Diaz
Deposited On:17 Jan 2013 22:45
Last Modified:09 Nov 2021 23:22

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